sbt.internal.librarymanagement.mavenint

This class contains all the logic for dealing with the extra attributes in pom files relating to extra attributes on dependency declarations.

Specifically, if we have a dependency on an sbt plugin, there are two properties that need to propogate:

• sbtVersion
• scalaVersion

These need to exist on the dependency declaration. Maven/Aether has no way to inject these into the section of pom files, so we use Ivy's Extra attribute hackery to inject a lookup table of extra attributes by dependency id into POM files and later we read these back.